Optical properties of aluminum dodecaboride (α-AlB12) in the region of the transparency window

摘要: The absorption coefficient of α-AlB12 was measured on single crystal samples at T=300 K within a broad spectral region (0.6–25 µm). In the transparency window (3–6 µm), in temperature range from 165 to 650 K. An analysis experimental data shows that energy spectrum local states bandgap has certain features. It established band lies near conduction and trap level is located 0.11±0.02 eV top valence band.